Step 1: Mount the ESRI ArcGIS Desktop v9.1 image or run the setup from your burned copy now, and install as normal.

Step 2: Run the supplied LMSetup.exe from the CRACK dir on the CD, which installs the ESRI license server in …\Program Files…\ESRI\License\arcgis9x
Choose our supplied license.lic when the setup prompts for it, and DO NOT REBOOT when asked.

Step 3: Copy the supplied license.lic, and ARCGIS.EXE file from the CRACK dir to the path where the License manager was
installed (mentioned in Step 1), and choose YES when prompted to overwrite any files (and ignore all the .lic files that reside in the dir!)
NOW REBOOT!

Step 4: Install the supplied registry file ESRIFloat.reg, by doubleclicking it, and choosing YES when prompted if it should be installed in registry.

Step 7: Switch to tab Configure Services, make sure ArcGIS License Manager is in the Service Name listbox.

Step 8: Browse to the correct License file path where you copied the license.lic file (propably the dir mention in step 1), and choose it as license.

Step 9: Check Start Server at Power up.

Step 10: Click Save Service to save the settings.

Step 11: Test the server by choosing the Start/Stop/ReRead tab, Click Stop server, then ReRead license file, then Start Server.
After that move to the tab Server Diagnostics and press the Perform Diagnostics button. If everything is done right, it should list all ok features.